A. In a Meselson-Stahl type experiment, bacterial cells grown in 15N medium for many generations were...

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Biology

A. In a Meselson-Stahl type experiment, bacterial cells grown in15N medium for many generations were washed and then allowed togrow in 14N medium. DNA was extracted just after transfer (0generation) and then after 1 and 2 generations. All these sampleswere analyzed by CsCl gradient centrifugation. From DNA isolatedfrom generations 0, 1 and 2 show.
B.Position of bands in the centrifuge tubes
C. 14N and 15N labelled DNA strands
Answer both questions for each mode of replication, conservativeand dispersive mode of replication.

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bacteria cells were grown in 15N medium for many generations for 0 generation In case of conservative replication the DNA will have both the strands with 15 N as it is the parent DNA grown in 15N media In semiconservative the Two strands will have only 15N Dispersive this will also have only 15N in both the strands as no replication occur in 147N media So the bands See Answer

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